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Crucible Products:

Bottom Type / Pour Method:

Capacity:

O.D. / Width:

Height:

Wall Thickness:

Melt Temperature:

Material Types:

Material Features:

Application / Industry:

Furnace Type:

Atmosphere Type:

Help with Crucibles specifications:

Crucible Products
   Crucible Products       
   Your choices are...         
   Crucible - Barrel / Bilge       Barrel crucibles have an opening with a top O.D. that is essentially the same as or only slightly smaller than the base or bottom O.D. The side walls are bulge out producing a barrel shaped crucible. 
   Crucible - Conical / Tapered       Conical or tapered crucibles have an opening with a top O.D. that tapers down to smaller base or bottom diameter. The side walls typically are straight sided. 
   Crucible - Cylindrical (Straight wall)       Cylindrical or straight walled crucibles have an opening with a top O.D. that is essentially the same as or only slightly smaller than the base or bottom O.D. The side walls are straight sided without any bulging out. 
   Crucible - High Form       High form crucibles have high walls compared to wide form crucibles. High form crucibles have an opening with a top O.D. that tapers down to smaller base or bottom diameter. The side walls typically have a slight outward bow or bulge. 
   Crucible - Skull Melting / Water Cooled       Skull melting crucibles or melting hearths have water or salt cooled copper shell that maintains an unmelted skin or skull of metal. The unmelted layer contains the melt. The melts are arc, plasma or electron beam heated.  
   Crucible - Tongue & Groove / Furnace Liner       Tongue and groove crucibles are a modular crucible system consisting of a series of interlocking components that stack together to form a furnace lining or crucible. Tongue and groove crucibles may use a backup of ramming cement behind the crucible, but not within the interlocking grooves. The absent of refractory cement between the ceramic crucible portions improves lining life and melt quality. 
   Crucible - Wide Form (Flat)       Wide form crucibles are low, shallow or flat profile with short walls compared to high form crucibles. The crucible has a very wide opening with an O.D. that tapers down to a much smaller base diameter. The side walls typically have a slight outward bow or bulge. 
   Crucible Back-up       Crucible or refractory component used to back-up or strengthen an internal crucible. The internal crucible may have greater chemical or erosion resistance to the melt, but lack in high temperature strength compared to the outer back-up crucible or component. 
   Crucible Liner       Crucible or refractory component used to line the crucible. The crucible liner may have greater chemical or erosion resistance to the melt, but lack in high temperature strength compared to the outer back-up crucible or component. 
   Evaporation Crucible       Evaporation crucibles are designed for use in holding a metal or material during an evaporation process in a thin film physical vapor deposition (PVD) system such as thermal source crucibles, electron or e-beam crucibles, resistance heated metal crucibles or insulating alumina crucibles held in a resistance wire heater coil or basket. Various configurations of evaporation crucibles are available such as tapered or cylindrical. 
   Ladle Shroud / Liner       Ladle shrouds or liners are used to protect a metal pouring ladle or ladle handle from molten metal or glass.  
   Melting Hearth / Tundish Liner       Specialized refractory ceramic or water cooled copper liners for melting hearths or tundishes. A melting hearth or tundish contains molten metal during melting, degassing, alloying, refining, filtering, mold pouring or metering metal in a continuous casting process. The tundish or melting hearth acts like a reservoir above the process where metal can be drawn off to fill the mold or continuous caster.  
   Muffle Ring       Muffle rings fit on the top of a crucible and allow additional solid material to be placed in the crucible and protrude above the top opening. The muffle assures that the metal melts down and falls only into the crucible and filling it to the required level.  
   Sampling Cup       Small ceramic cups that can be plunged into a melt to sample the molten metal and/or gases within the metal melt. 
   Cover / Lid       Cover closes over the top of a crucible, tube, dish or other vessel to contain or protect the material being processed inside the vessel. 
   Other       Other unlisted, specialized, or proprietary crucible type. 
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   Bottom Type / Pour Method:       
   Your choices are...         
   Flat Bottom       Crucible or labware container having a flat bottom. 
   Round Bottom       Crucible or labware container having a round or rounded bottom like a test tube. 
   Pouring / Metering Hole       Crucible or labware container having an open bottom or metering hole for pouring out liquid chemical or molten metal. 
   Pouring Spout       An integral or optional pouring spout on a crucible is an open channel that directs a poured stream of the molten metal or material to the desired location. 
   Other       Other unlisted, specialized, or proprietary pour method or bottom type. 
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Specifications
   Capacity:       The volumetric holding capacity of a crucible. The weight capacity of the crucible in pounds of steel or pounds of aluminum can be estimated by multiplying the volume capacity times the material density. Aluminum has a density of approximately 2.7 g/cc. Steel density has a density of approximately 7.8 g/cc.  Adjustments should be made to account for the actual fill level used during processing. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   O.D. / Width:       Outer diameter or width of stock form material such as bar, plate, and tube. Also, the outer diameter or width of fabricated components such as crucibles. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Height:       Height of a crucible or another fabricated component. Length of a stock form material such as bar, rod, plate or tube.  
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Wall Thickness:       Wall thickness of a crucible or another fabricated component. Thickness of a stock form material such as bar, rod, plate or tube.  
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Melt Temperature:       The maximum temperature at which the refractory or ceramic material can be used continuously without the degradation of structural or other required end-use properties. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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Material Type
   Material Types:       
   Your choices are...         
   Alumina       Alumina or aluminum oxide (Al2O3 ) is a compound of aluminum metal and oxygen usually used in the alpha alumina structural form. In its pure form alumina is a white, high hardness ceramic. Fully dense alumina can be translucent. Alumina has found wide application due to its versatility and a relatively low raw material cost. Depending on the purity and density, alumina is used for refractory tubes, industrial crucibles, analytical labware, dielectric substrates, wear components, refractory cements and abrasives. Alumina's main drawback is its relatively poor thermal shock resistance due its higher coefficients of thermal expansion and lower thermal conductivity compared to other pure ceramic materials such as SiC.  
   Alumina - Silicon Carbide       Alumina-silicon carbide (Al2O3-SiC) ceramic consists of an alumina matrix reinforced with silicon carbide particles or fibers. Al2O3-SiC ceramics are essentially ceramic matrix composites.  
   Aluminum Nitride       Aluminum nitride (AlN) ceramics are compounds of aluminum metal and nitrogen. Aluminum nitride is relatively inert and its good thermal conductivity combined with high electrical insulation ability makes these materials useful as substrates, insulators and barrier layers in microelectronics applications. 
   Aluminum Silicate / Sillimanite       Sillimanite, fibrolite, aluminum silicate (Al2SiO5 ) is a compound of silicon, aluminum and oxygen. Sillimanite is also a naturally occurring mineral. Sillimanite is calcined to produce 
   Boron Nitride       Boron nitride (BN) ceramics are based on compounds of boron and nitrogen. Boron nitride is relatively inert and it has good thermal conductivity combined with good electrical insulation ability making this material useful in fabricating substrates and insulators in microelectronics applications. BN is polymorphic; i.e., BN occurs in a wide variety of crystalline structure forms. BN is available as amorphous or vitreous, pyrolytic, hexagonal and cubic crystal structures. Cubic boron nitride (CBN) is a superabrasive and is second only to diamond in hardness. BN is more resistant to oxidation compared to carbon. Depending on the purity, density and crystal structure boron nitride is used for refractory linings, industrial crucibles, arc furnace electrodes, analytical labware, composites, refractory cements and superabrasives. Hexagonal BN is structurally weak and is used as a high temperature lubricant or coating. 
   Calcium Aluminate       Aluminate based refractory calcium aluminate Bauxite is a hydrated aluminum oxide mineral with iron, silica, titanium and sodium oxide impurities. 
   Carbon / Graphite       Carbon (C) is a non-metallic element with an extremely high sublimation temperature and a wide variety of crystalline structure forms (polymorphism). Carbon is available as amorphous / vitreous carbon, pyrolytic graphite, hexagonal graphite, diamond or diamond-like carbon. Carbon without a protective coating must be used in reducing or vacuum atmospheres to prevent oxidation at elevated temperatures.  Depending on the purity, density and crystal structure carbon is used for refractory linings, industrial crucibles, arc furnace electrodes, analytical labware, composites, refractory cements and superabrasives.  
   Chromia / Chromite       Chromia ceramics or refractories are based on compounds of chromium and oxygen.  
   Copper (Water Cooled)       A common reddish metallic element that is ductile and malleable and is one of the best conductors of heat and electricity. Copper is used in skull melting vessels or crucibles where external cooling maintains a solid skin or skull that contains the molten metal. Copper is often grouped with other noble metals. 
   Dolomite (MgO-CaO)       Dolomite refractories are based on calcium magnesium oxide or calcium magnesium carbonate minerals. 
   Fused Quartz       Fused quartz is a high purity, crystalline form of silica used in specialized applications such as semiconductor wafer boats, furnace tubes, bell jars or quartzware, silicon melt crucibles, high performance lamps such as mercury and quartz halogen, ultraviolet (UV) lamps, thermocouples protector, waveguide handles, analytical labware and other high temperature products. 
   Fused Silica / Glass       Fused silica is a compound of silicon and oxygen. High purity amorphous fused silica is a high performance ceramic with very low expansion, remarkable thermal shock resistance, low thermal conductivity, excellent electrical insulation up to 1000°C and excellent resistance to corrosion from molten metal. 
   Kaolin / Fireclay Based       Kaolin based refractories or ceramics are using natural kaolin or a mixture or clay and other ceramics such as alumina, calcium aluminate or silicon carbide. Kaolin acts as a binder and provides plasticity. Kaolin is a hydrous aluminum silicate [Al2(Si205)(0H)4 ] based mineral clay. Kaolin is also referred to as clay, anhydrous aluminum silicate, aluminum silicate dihydrate, nacrite, dickite, kaolinite, calcined, kaolinite; china clay, bolus alba, porcelain clay, aluminum, silicate hydroxide, or aluminum silicate (hydrated). The plate-like structure allows particles in a wet clay mass to slide across each other and maintain plasticity. Kaolin is white soft plastic clay composed primarily of well-ordered kaolinite mineral [Al2Si2O5(OH)4] with minor amounts of quartz, feldspar, and sheet silicate minerals (mica, illite, smectite, and chlorite). Geologically, there are two types of kaolin deposits, i.e. primary and secondary kaolin. Primary kaolin is formed through the alteration, or kaolinization, of in-situ minerals of feldspar and other aluminum silicates to kaolinite. Secondary kaolin is laid down as sediments, usually in fresh water, far from the place of origin. Various types of secondary kaolin are ball clay, fireclay, or flint clay depending on kaolinite content and their properties. 
   Magnesia / Magnesite       Magnesia ceramics or refractories are based on compounds magnesium and oxygen. Magnesite or magnesia refractories or minerals are also known as magnesium oxide, magnesium carbonate, dead-burned magnesite, calcined magnesite, periclase or magnesia clinker. Depending on the origin and processing, magnesia is divided into caustic, dead-burnt, fused, precipitated, sintered or calcined and synthetic magnesia forms. The high melting point (2800°C) and the heat resistance  (1700°C in the reducing and 2300 °C in oxidizing atmosphere) of magnesium oxide make it suitable for the production of refractories. Magnesite is the naturally occurring mineral or ore used to produce magnesium oxide based refractories. Magnesite often contains iron, manganese or other activator elements. Magnesium oxides with a carbon bond are used in the steel industry. Magnesite refractories have good resistance to molten iron and steel.      
   Metal Boride       Boride ceramics are compounds of a metal and boron such as zirconium boride (ZrB2) or titanium boride (TiB2 ). Titanium borides increase in ductility with an increase in temperature. 
   Molybdenum / Mo Alloy       Molybdenum is a refractory metal with high elevated temperature strength and good. Evaporation boats and crucibles are often fabricated from molybdenum due to the metal's high melting point (2610oC).  Molybdenum has a grayish color. 
   Mullite       Mullite (3Al2O3-2Si02 or Al6Si2O13 ) is a compound of aluminum, silicon and oxygen. Mullite can also be viewed as a phase in the alumina-silica binary system. Mullite is a synthetic, fused or calcined crystalline aluminum silicate produced in electric arc furnaces from alumina and silica. Mullite usually has an off-white or tan color. Depending on the purity and density, mullite can have superior dielectric and thermal shock properties and resistance to slag and silicate refractory bonds. Mullite is used for refractory tubes, industrial crucibles, analytical labware, dielectric substrates, wear components, and in refractory cements. Refractory grade mullite or alumina-mullite mixtures are commonly produced by calcining Kyanite minerals.  
   Nickel / Nickel Alloy       Nickel and nickel alloys provide a low cost alternative to refractory or noble metal in certain alkaline, acid and other specific chemical environments. Nickel virtually immune to attack by phosphoric acid and highly resistant to corrosion by most strong alkalis. Nickel is attacked by concentrated nitric acid, sulfurous acid, ammonium hydroxide and hypochlorite solutions. 
   Nitride (AlN, BN)       Nitride ceramics are compounds of a metal or metalloid (Si, B) and nitrogen such as titanium nitride (TiN), silicon nitride (TiB2), boron nitride (BN) or aluminum nitride (AlN). Nitrides are relatively inert and have good thermal conductivity combined with high electrical insulation capability making these materials useful as substrates, insulators and barrier layers in microelectronics applications. 
   Platinum / Pt Alloy       Platinum is an extremely corrosion resistance noble metal and has excellent resistance to attack by acids and fusion mixtures.  Platinum can be fabricated by conventional methods due to the metal good ductility and weldability. Tantalum has a dark bluish gray color. Iridium and rhodium additions are used to form platinum alloys with high strengths. Zirconia particle additions are used to impede grain growth and maintain a fine crystal structure. 
   Porcelain       Porcelain materials are used for both useful industrial and ornamental applications. Traditional porcelain is made from a mixture of feldspar, clay (koalin) and flint. Steatite or cordierite porcelains are commonly used in electrical insulator applications. Many porcelain compositions are based on the K20-Al203-SiO2 or Mg0-Al203-SiO2 ternary systems. The term "Porcelain' comes from the Italian "porcell" which means "little pig", a name given to a smooth, white cowrie shell. 
   Sapphire       Sapphire is a high purity and density, single crystalline form of aluminum oxide, which may contain chromia, titania, yttria or other dopants. Sapphire is usually transparent or translucent.  Sapphire ceramics are used in lasers, substrates, jewel bearings, watch crystals or other specialized optical, wear and electronic applications. Ruby, corundum, topaz are other names for natural or synthetic sapphire. Ruby is chromium doped sapphire used in optical filters and laser rods.   
   SiAlON       SiAlON (Al2O3-Si3N4) is an alloy of silicon nitride and aluminum oxide. SiAlON has the combined properties of silicon nitride (high strength, hardness, fracture toughness and low thermal expansion) and aluminum oxide (corrosion resistance, chemically inert, high temperature capabilities and oxidation resistance). SiAlON is superior refractory material for components exposed to high temperatures, mechanical abuse, corrosion, wear or applications requiring electrical resistance. 
   Silicon Carbide       Silicon carbide (SiC) is a compound of silicon metalloid and oxygen usually used in the alpha silicon carbide structural form. SiC is a black, high hardness ceramic that usually is harder than alumina. Depending on the impurity additions, silicon carbide is green or black in color. Fully dense silicon carbide can be transparent (Moissanite). Silicon carbide has found wide application due to its versatility and a relatively low raw material cost. Depending on the purity and density SiC is used for refractory tubes, industrial crucibles, wafer semi-insulating substrates, wear components, refractory cements and abrasives. Alumina's main drawback is its relatively poor thermal shock resistance compared to materials with lower coefficients of thermal expansion. SiC forms a protective SiO2 skin to prevent further oxidation at very high temperatures in non-reducing atmospheres. Silicon carbide has relatively high thermal shock resistance compared to other ceramic materials due its low coefficient of thermal expansion combined with high thermal conductivity.   
   Silicon Nitride       Silicon nitride (Si3N4) is a compound of silicon and nitrogen.  Silicon nitride has superior mechanical properties and forms a protective SiO2 skin at high temperatures. Silicon nitride is difficult to sinter by conventional means because the material dissociates above 1800oC. 
   Tantalum / Tantalum Alloy       Tantalum is an extremely corrosion resistance refractory metal.  Tantalum can be fabricated by conventional methods due to the metal good ductility and weldability. Tantalum has almost complete immunity to acid attack. Tantalum's corrosion resistance exceeds that of titanium and nickel alloys in many environments. Evaporation elements, boats and crucibles are often fabricated from tantalum due to the metal's high melting point (2996oC) and inert nature. Tantalum has a dark bluish gray color. 
   Tungsten / W Alloy       Tungsten is a refractory metal with high elevated temperature strength. Evaporation boats and crucibles are often fabricated from tungsten due to the metal's high melting point (3410o C).   Tungsten's brittle nature and high melting point results in fabrication using powder metal techniques. Tungsten has a grayish color. 
   Zircon       Zircon is a compound of a zirconium silicate, ZrSiO4, which is found in nature in the form of zircon sand. Zircon has useful refractory properties. 
   Zirconia       Zirconia or zirconium oxide (ZrO2 ) is an extremely refractory compound of zirconium and oxygen. Zirconia may have additions of calcia, magnesia or yttria to stabilize the structure into a cubic structure. Zirconia stabilized in the cubic crystal structure avoids cracking and mechanical weakening during heating and cooling.  Certain zirconia materials have the ability to transformation toughen (tetragonal to monoclinic phase change) under applied stress and it is frequently used in wear applications requiring improved fracture toughness and stiffness over alumina. Zirconia ceramics possess excellent chemical inertness and corrosion resistance at temperatures well above the melting point of alumina. Zirconia is more costly than alumina, so it is only where alumina will fail. Zirconia has low thermal conductivity and it is an electrical conductor above 800°C. Zirconia is used to fabricate oxygen sensors or fuel cell membranes because zirconia possesses the unique ability to allow oxygen ions to move freely through the crystal structure above 600°C. Zirconia products should not be used in contact with alumina above 1600°C.  Depending on the purity and density zirconia is used for refractory tubes, industrial crucibles, analytical labware, sensors, wear components, refractory cements, thermocouple protection tubes, furnace muffles, liners and high temperature heating element supports. 
   Zirconium / Zirconium Alloy       Zirconium is an extremely corrosion resistance metal.  Zirconium has a melting point (1856oC). Zirconium is can be fabricated by conventional methods due to the metal good ductility.  Zirconium is resistant to attack by most acids. Zirconium metal is silvery white in color. Zirconium forms an oxide scale and becomes embrittled in oxidizing atmospheres at temperatures above 850oC. Zirconium is resistant to fusion by low melting metals that normally attack other crucible materials. 
   Other       Other unlisted, specialized, or proprietary ceramic or refractory type. 
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   Material Features:       
   Your choices are...         
   Composite / Hybrid       Composite materials consist of a matrix material reinforced with a stronger or higher modulus second phase.  The second phase may be in the form of particulates, chopped fibers or continuous fibers. The matrix may consist of a ceramic (CRC, ceramic matrix composite), a metal (MMC or metal matrix composite) or a polymer material. Ceramic or glass fibers are commonly utilized as the reinforcement due to their high strength and/or modulus. 
   Glaze / Protective Coating       Ceramic or refractory body that uses or is available with a glaze (fused glass enamel), metallized coating, plastic coating or other protective coatings. The coating may seal porosity, improve water or chemical resistance or enhance joining to metals or other materials. 
   Electrical Insulator       Ceramics with intrinsically low electrical conductivity. Internal porosity will also lower bulk electrical conductivity. 
   Porous / Thermal Insulator       Porous ceramics have a large degree of open or closed internal pores that provide a thermal barrier. Certain ceramics have intrinsically low thermal conductivity even in dense forms. 
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Application / Industry
   Application / Industry       
   Your choices are...         
   Aluminum Melting       Refractory ceramic materials and components suitable for use in aluminum smelting, melting and casting operations such as thermocouple protection tubes, combustion gas heaters tubes and die casting stalks or sleeves. 
   Ceramics / Glass Manufacturing       Ceramics, refractories or crucible with resistance to molten glass or compatible with ceramics and glasses during firing, calcining or fusing in a kiln or furnace. 
   Chemical Processing       Ceramics and refractory materials and components suitable for chemical processing application due to high temperature and/or corrosion resistance. 
   Foundry / Casting        Ceramic and refractory crucibles, tubes, stoppers, liners, spouts, permanent molds, thermocouple protection tubes, combustion gas heater tubes, submersible heater tubes, die casting stalks / sleeves and other furnace components used in foundries for melting and casting aluminum, steel, copper alloys or other metals. 
   Iron & Steel Melting       Refractory ceramic materials and components suitable for use in iron and steel smelting, melting and casting operations. 
   Optical / Optoelectronic       Ceramic materials specialized for use in fabricating or processing optical components such as lenses, windows, prisms, telecommunications optical fiber and lasing material components. Single crystal ceramics, transparent ceramics, sapphire and quartz are example of materials with optical applications. 
   Nickel Base / Superalloys       Superalloys, typically nickel or cobalt alloys are used in jet engine and gas turbine applications which require the high temperature strength and oxidation resistance of these alloys.  
   Precious / Red Metals       Crucibles suitable for melting, alloying or refining precious or red metals. Red metals include copper, brass, bronze and other copper alloys. Precious metals include silver, gold, platinum  and palladium. 
   Semiconductor Manufacturing       Ceramics or other non-metallic compounds or elemental semiconductors used as substrates and wafers in semiconductor manufacturing. Also, ceramics used for wafer chucks, wafer furnace boats and thin film chamber liners. 
   Titanium / Reactive Metals       Crucible or other refractory products designed for melting, processing or casting reactive metals such titanium, zirconium or hafnium, which tend to dissolve or react with most crucible and mold materials. Copper cooled crucible or coatings of yttria-ceria layers are often used in titanium melting applications. 
   Other       Other unlisted application. 
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   Furnace Type:       
   Your choices are...         
   Arc / Plasma Melting       Arc melting, plasma arc melting (PAM), electro-slay remelting (ESR) or vacuum arc remelting (VAR) furnaces employ an electric arc or plasma stream to fuse and refine or process alloys such as nickel based superalloys, titanium alloys, tool steels or stainless steels. 
   Electron Beam Melting       Crucibles and vessels suitable for use with electron beam melting equipment. Electron beam melting use a focused high energy beam of electrons to melt a metal or material. A vacuum atmosphere is required to avoid absorption of the electrons. 
   Evaporator / CVD Furnace       Evaporation or physical vapor deposition (PVD) furnaces or systems are used to deposit films or grow substrates. In evaporation system, an evaporated material is condensed onto a substrate to build up a thin film or coating. Specialized crucibles, filaments and boats are required to hold the source metal during the evaporation process. 
   Gas Fired       Gas fired furnaces heat the furnace or crucible using the combustion of natural gas, propane or other gases. 
   Induction       Induction furnaces use coils to induce an electric current in a metal with enough internal resistance to melt the alloy through joule (I2R) heating. Non-conductive ceramic crucibles should be chosen that do not interfere with the action of induction coils. 
   Resistance Heating       Resistance furnaces use resistance heating coils that indirectly heat and melt the alloy or material.  
   Other       Other unlisted, specialized, or proprietary atmosphere or melting furnace type. 
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   Atmosphere Type:       
   Your choices are...         
   Air / Oxidizing       Furnace or thermal processing system employing an air or oxidizing atmosphere. Crucibles should be chosen that are resistant to oxidization or burn-up at the end-use temperature. Graphite or refractory metal crucibles may burn up if used at high temperature in an oxidizing atmosphere. 
   Inert       Furnace or thermal processing system employing an inert gas such as argon as an atmosphere or shielding blanket.  
   Reducing       Furnace or thermal processing system employing a reducing  gas such as hydrogen an atmosphere. Crucibles should be chosen without constituents that can be reduced at the end-use temperature. Iron oxides or silica could be reduced to iron or silicon under high temperature, reducing conditions. 
   Vacuum       Furnace or thermal processing system employing a vacuum as an atmosphere. Crucibles should be chosen that do not consist of volatile or high vapor pressure components at the end-use temperature. 
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